Adjustable davit



A. P SCHAT. ADJUSTABLE DAVIT; APPLICATIQN FILED ocr. 26. 1913.

Patented 0st. M, W22.

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ADJUSTABLE DAVIT.

Application filed October 26, 1918. Serial No. 259,790.

,My inventionrelates to devices for regulating the automatically operating davit which forms a part of the subject matter of my allowed application Ser. No. 230,106.

My object is to provide means for adjustably supporting the davit' at different angles of inclinationi and in, diflerent planes, whereby to regulate its power of automatic movement and to predetermine the direction and limits of'said movement. 1

An important feature'of the construction shown in the. drawings consists of a frame designed to be; rotatably mountedon the deck oi 'a ship, and having for the dav t a rocking support held at: right angles to 'the plane of rotatable movement Of the The invention consists in certain novel.

. tion.

frame, with. the davit rotatably mounted in said support; a

features 'Of construction and arrangement of parts as will be hereinafter described and claimed, reference being had to the accompanying drawings, in which:

F ig." 1 is a" top plan viewyotf my inven- Ition, with the vdavit proper shown in section; and, Y

Fig. 2 shows my device in side eleva- The numeral ldlldlCatt-Bs the. deck-off a ship a on which is mounted the "frameah, having at its rear endthe strong;leg or standard 2, and at its forward end the two legs 3 spaced well apart from each other and connected together their upper ends by the integral crossbar 4, which. inturni's connected with the rear standardj2 by the longitudinal bars 5' which are parallel with The forward ends 1 of the longitudinal bars 5 are also integrally connected with the rear post 2 by the downwardly andrear- .1 wardly extending flanges or plates 6 which are :connected together at their. bottoms by the bottom rot thejframehwhich may be formedintegral' with them if desired. Extending" rearwardly from the lower end of the standard 2 isthe strong semicircular flange 8, and extending forwardly from the lower ends of the front standards .orJegs 3 andthe-parallel plates 6, is the integral segmental flanget). The flange 8 at therear-jend'of the frame is provided with a strong pivot 10 securely anchored in. 'the d'eck of the ship and upon which the frame} it rotates while-the segmental flange .9 at the forward end of the frame is provided with a segmental slot 11 struck fromv the pivot point 10 at the rear'fend' of the frame, threaded bolt 12 extends upwardly through this slot fromthe deck of theship andis provided with a nut 13 having an operating handle 14. y

. The frame is provided at its bottom between the two parallel plates 6 with a longitudinally] extending rack 15, shown in dottedlines'finflfig. 2, and mounted on this rack is a quadrant l6 adapted to be rocked back and forth thereupon. The quadrant issnugly received at its lower side between the two plates 6, and atits top vbetween the two longitudinal bars-5,"'whereby it is suitablywguided in its rockingmovement;

tatably mounted in this quadrantwhich is provided at its upperend with abore 18 through which the davitpasses. Art the extremetop of the frame I provide the guide-bars 19 which extend from the transverse bar 4: to the rearwstandard 2, be-

'i'ng rigidlysecuredto these parts. These barsl9 are located immediately. above the longitudinal bars 5' and extend parallel therewith, the barsifi being also guide-bars adapted to cooperatewith said bars ,19 to .form guides for theguide-block 20, which is provided at its forward end. with two parallel apertured ears 21 adapted toreceive between them the cooperating aperturedlug orcar 22 extending. rearwardly from the top of the q'ua'drant 16, said lugs being op eratively connected together by the pin 23. f r The" screw bar 24 passes through the upper end of the standard2 with which it has threaded engagement, and is suitably connected at its inner end with the guide-block which is adapted to bemoved back and forth by said screw bar, the bar being provided on its outer-end with the hand wheel 25 for convenient manipulation. a

From the construction shown, it will be seen that the davit will tend to automati llhelowerportion of the davitfll7 is ropoint toward which the davit shall tend to move and come torest canbbe accurately predetermined. j

Hence it will be seen that the combined effect of the rotary'movement of the frame and the rocking movement of the davit will b be to impart to-the davit a greater or less tendency, as may be desired, to automatically swing to any desired point of' the compass.

The frame rotatably 1 voted its rear endii1stead of at" its forward end, because ordinarily the davit will swing out over the forwardend, and it isfthe refore desirable that that should be the movable end of the frame because the weight of the davit will tend to hold that end down in firm fric tional engagement with the deck of theship,

and the greater the weight on the davit the more firmly will'it be held, even though, under peculiar stress or excitement, the securing nut13 mightnot have been screwed down firmly asit should have been. On

the other-hand, it will be seen that the load on the davit will tcndt'o move the rear end of theframe upwardlya movement which if permitted through possible carelessness or oversight might prove disastrous. Therefore the frame is rotated from its rearward end and is permanently locked in rotatable engagement with the ships deck 'at that point. v

Of course the davit can be caused to incline toward the rearend of the frame if desired, but, in cases wherenses of that kind are contemplated, the rear end of: the frame should be provided. with a transverse bar having legs at its ends similar to the transverse bar 4t and the legs 3 at the forward end of the frame, to better support the lateral. strain imposed upon'the frame as the davit swings its load around. By this arrangement the rear end of the frame would be supported against lateral strain just as the forward end is now supported.

@fcourse-it is not compulsory that the pivot upon which the frame rotates should beat'one end or the other, since it may be at. any point between the two ends of the frame. In cases where the frame is to be frequently turned around .to any consid- -.erable degree the pivot point can be at the centre, which war. permit the frame to turn around its-centre, thus requiring much less -.space than for it to swing around its pivot aziness point at one end as it now does. However. it is thought that for ordinary uses the arrangement here shown is best.

l t may here be observed that, since the davit can be caused to incline toward cithcr cud of the frame, in no case would the frame have to be rotated through more than lSll dc recs, or half a circle, in order to impart to the davit a. icinlcm'y to move to any point of the compass.

is to the operation of my device it is only necessary to add to the foregoing that when it is desired to swing automatically toward any given direction, the forward end of the frame is swung around. to cause the frame. to extend longitudinally in that direction; or in other words, the frame is swungaround with its forward end far-inf! in that direction. l hc frame is; then sccured in that position by a proper turn of the ut l3.

To increase or diminish the power of automatic movement of the davit toward the desired point .it is now only necessary to increase or diminish the angle of inclination of the lower portion of the davit by properly turning the regulating screw bar 24, which operates through the guide-block 20 and the quadrant 16.

Since in my device the screw bar 24. is 1 not designed to lift the davit but simply to adjust it, this bar only needs to be short, which considered in connection with other features of the device, gives a. very neat, compact construction, while at the same time adapting the davit for l'iniversal movement with a wide range of power to move automatically in any direction desired.

It will be noticed that my frame, though not very heavy is yet an exceedingly strong, durable. anih-as has already been stated compact construction :nlmirably adapted, to withstand the sudden strains oflcn imposed upon devices of this character.

Having now disclosed the principles of my invention, and shown one method of practically embodying these principles, l yet do not wish to be limited. to the single construction herein shown, but desire protection on all that comes clearly within the spirit and scope of my invention.

hat I claim as new and desire to secure by Letters Patent is:

1. device of the character described. comprising a davit; and a. movable su iiport for the same mounted on. the deck of the ship, said support being pivoted at its innor end to the deck with its outer end adapted to swing horizontally outward and inward around said pivotal centre, to cause said support to extend at any desired angle relatively to the longitudinal extent of the ship, said horizontally swinging end of the support being provided with means for holding the support in its adjusted positions,

lffll lfili and ha ving bearings for holding the davit to rotate on its longitudinal axis in an inclined position, to impart to the davit a tendency to rotate by gravity in the direction of its inclination, the inclination of said bearings being; in a vertical plane extending longitudinally of said support; whereby to adjustably support the davit at different distances from the sides of the ship, and to vary the angle, relatively to the longitudinal extent of the ship, to which the davit will tend to rotate by gravity.

2. A device of the character described, comprising a rotatable frame adapted to be mounted on the deck of a ship; a rocking member mounted in the frame; a clavitmounted in the rocking member to rotate on its longitudinal axis therein; and means for adjusting the rocking member to vary the angular relation of the davit to the frame.

A device of the character described, comprising a frame adapted to rotate laterally on the deck of a ship, and having a longitudinally extending rack; a toothed quadrant mounted torock on said longitudinal rack; a davit having its upper and lower portions disposed at an angle to each other and with its lower portion mounted to rotate on its longitudinal axis in said quadrant; and means for adjusting the quadrant to vary the angular relation of the lower provided with a segmental slot; means 00- operating with said slot and flange for holding the frame in adjusted position on the deck of the ship; a toothed rack extending centrally from the forward to the rearward end of the frame at the bottom thereof; a toothed quadrant mounted to rock on said rack; a davit mounted in said quadrant and adapted to rotate on its longitudinal axis therein; an adjusting screw centrally located at the rear end of the frame for controlling said quadrant to vary the angular relation of the davit to the longitudinal extent of the frame; a guide-block connecting said screw and quadrant; and guides at the top and hotiipm of the frame for the quadrant and guidelook.

In testimony whereof I affix my signature.

ANE PIETER SCHAT. 

